Abstract: Three -dimensional numerical simulation of aluminum molten fluid in electromagnetic field was performed with MHD module and standard k-ε turbulence model in computational fluid dynamics software Fluent. The temperature field of aluminum molten fluid in electromagnetic field was obtained by adjusting the electromagnetic field in the molten fluid and its internal flow field under different frequencies. Meanwhile, molten refiner particle was selected to trace in order to obtain particle trajectories. The results indicate that Fluent on simulating the aluminum molten liquid is feasible in electromagnetic field, which lays the foundation for the future studying of chaotic convection in the electromagnetic field.